Finding the Fourth Proportional to 2,253.12, 3,109.34 and 1,258.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,253.12 : 3,109.34 = 1,258.49 : x
2. Step 2: Convert to fraction form
   2,253.12/3,109.34 = 1,258.49/x
3. Step 3: Cross multiply
   2,253.12x = 3,109.34 × 1,258.49
4. Step 4: Simplify right side
   2,253.12x = 3,913,059.65
5. Step 5: Solve for x
   x = 3,913,059.65/2,253.12
6. Step 6: Final answer
   x = 1,736.73